Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With interrelated clamp closer and tool mover
Patent
1991-10-11
1993-07-13
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With interrelated clamp closer and tool mover
72328, 72336, 72404, 72427, B21D 2210
Patent
active
052263061
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a bead forming metal die for forming beads in a metal gasket which is inserted and bolted between contact surfaces of a cylinder head and a cylinder block of an internal combustion engine, and, more particularly, to a bead forming metal die, having a bead forming die disposed between a hole punch die section and an outer profile punch die, used in a progressive pressing in which a metal plate is progressively moved for punching out holes, forming beads and punch out a profile of gasket, in order.
TECHNICAL BACKGROUND
For forming a gasket from a metal strip by the use of a punch, after punching out a desired profile of gasket from a metal strip by the use of a single shot type die, a bead forming process is necessary for form a bead in the punch-out part for an increased in sealing property.
Conventionally, these processes are independently performed through single shot processes in such a way to punch out a gasket, to punch out holes in each gasket and, then to forming beads in the gasket. Because of the necessity of at least two independent processes for each gasket, such a bead forming manner is inefficient and is one of cost up factors.
In recent years, in such circumstances, an improvement has been made to decrease the number of steps by progressively moving a metal strip to a hole punch die and an outer profile punch die arranged side by side, which are conventionally, independently used as single shot dies.
However, even in this manner, although the hole punch die and an outer profile punch die are progressively put in processes, the bead forming must be performed in an independent process.
The present invention has made due to the nature of conditions and has an object to provide a bead forming die for forming beads in a gasket which allows at least three processes of punching holes, forming beads and punching an outer profile of gasket in a progressive process.
DISCLOSURE OF THE INVENTION
The present invention relates to a progressive pressing type of bead forming metal die for forming gasket beads constituted by a bead forming die, for forming beads surrounding sealing sections, disposed between a hole punch die and a outer profile punch die, characterized in that the bead forming metal die comprises a pair of, upper and lower, inner bead boundary base blocks supported by upper and lower holders for pressing a desired shape of beads and in-bead flat sections, a stripper disposed so as to slide along the outre surface of the upper inner bead boundary base block, a die secured in contact with the outer surface of the inner bead boundary base block and disposed facing the stripper, a stopper, disposed between the stripper and the upper holder, which is adjusted in height so as to press and form an out-bead flat section between and by the stripper and the die when the upper and lower inner bead boundary base blocks are brought into press contact with each other, and an elastic member for urging the stripper toward the die.
According to the structure, pressing a metal gasket, including punching holes, forming beads and punching an outer profile, is performed by progressively moving a metal strip, and a desired shape of bead and an in-bead flat section is press formed by bringing the upper and lower inner bead boundary base blocks into press contact with each other.
Because the stripper disposed around the outer surface of the upper inner bead boundary base block is faced to the die disposed around the outer surface of the lower inner bead boundary base block, and the stopper is adjusted in height so that the corresponding surfaces of the stripper and die are brought into press contact simultaneously when the upper and lower inner bead boundary base blocks are brought into press contact, an out-bead flat section is press formed by a pressure cased by the facing surfaces of the stripper and die without producing wrinkles during forming the beads. The stripper further serves as a means for removing swarf which is produced when the hole punch die and
REFERENCES:
patent: 798530 (1905-08-01), Rehfuss
patent: 2177027 (1939-10-01), Plumb
patent: 2413591 (1946-12-01), Sturdy
patent: 2434375 (1948-01-01), Van Saun
patent: 2989936 (1961-06-01), Farnsworth
patent: 4112732 (1978-09-01), Okunishi
patent: 4606213 (1986-08-01), Persson
Numaya Kuniaki
Yoshino Nobuo
LandOfFree
Bead forming metal die for forming metal gasket does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bead forming metal die for forming metal gasket, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bead forming metal die for forming metal gasket will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2304424